[DeTomaso] Electronic Speedometer Conversion Details- And LargeFormat Schematics

[Jim Gray]

Chris,

I'm taking my signal for the cruise control right from the tach feed on the
MSD box.  I didn't have to use the speedo feed at all.

Just my experience
Jim Gray

-----Original Message-----
From: detomaso-bounces at realbig.com [mailto:detomaso-bounces at realbig.com]On
Behalf Of Chris Difani
Sent: Friday, May 04, 2007 1:45 AM
To: detomaso at realbig.com
Cc: SOBill at aol.com
Subject: [DeTomaso] Electronic Speedometer Conversion Details- And
LargeFormat Schematics

Guys:

Sometime ago I converted from my original speedometer and tachometer to
Autometer electronic instruments. I did this for a couple of reasons, one of
which was the white face, and the other was the electronic instrument
technology. One part of the speedo conversion is the pulse generator that
replaces the speedo cable angle drive unit in the ZF. I obtained my pulse
generator from Speedometer Services in Milwaukee, WI, courtesy of SOBills'
database.

So now you're really wondering why the heck I'm talking about this...

Glad you asked.

In my never ending quest for every technical toy that can be stuffed into a
Pantera (that's what Mike Drew says I'm doing), I'm installing an electronic
cruise control. And now we're getting to my point.

An electronic cruise control requires a pulse generator that operates within
a specific frequency range, or "pulses per mile" range. For those of you who
have changed to the electronic Autometer speedometer, the ZF pulse adapter
generates approximately 25,600 pulses per mile. For instance, the Dakota
Digital electronic cruise control works with any pulse generator that pulses
between 2,000 and 40,000 per mile.

Okay, that's my first gem of information.


Now for a totally unrelated piece of information.

I'm in the depths of wiring my '73 L. To help me I've gathered up every
piece of information on wiring our cars that I could find. Some of this
information came from POCA, and consists of a PDF file that has the complete
schematics and diagrams in it.

For all of you who have this same information, I'm sure you have noticed
that the lines representing the wires, are very, very close together. So
close that it's darn hard to trace them. So hard that after a short time you
can get a nasty headache... and also end up stuffing the wrong wire into the
wrong place.

Having had this happen to me, I decided that one solution was to enlarge the
schematic. I mean big. 3 feet by 4 feet big. I found that my local Staples
Business Center was able to print me out the schematics for less than ten
dollars in 3 feet by 4 feet. In fact I got so excited by this that I also
had mine laminated. They laminate at the cost of two dollars per square
foot. The big schematic is 12 sq ft, and ended up costing me $28 total. $4
for the original print, then $24 for the lamination. And now I can draw on
it with magic markers, and actually SEE what I'm looking at.

One word of caution, Staples requires these large format files to be in the
JPG format. What I did is make the conversion on my home PC, copy the JPG
file to a "thumb drive" or flash memory drive, and take that with me to
Staples. It took them about 20 minutes to print out all my paper copies, and
smaller laminations (most Staples can only laminate up to 2 ft by 3 ft, the
larger sizes have to be sent to their regional "hubs" for the service).

If anyone has any questions, etc., don't hesitate to ask,

Chris

Chris Difani
'73 L #5829 "LITNNG"
Sacramento, CA
Email: cdifani at pacbell.net



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